儿童室间隔缺损封堵术前后三维超声心动图定量左心室功能对比研究
인동실간격결손봉도술전후삼유초성심동도정량좌심실공능대비연구
Research on left ventricle quantitative function by three-dimensional echocardiography before and after ventricular septal defect occlusion of child
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